Bruce,

Thanks so much! I couldn't find the link when I posted last night. That is the online version of Minakov's last physical books, 1st edition of the CD. Turns out he subsequently produced more drawings which were included in the later editions. Nice thing about the online version is you can Google Translate it and read his incredibly in-depth explanations of various topics. We spent a fair amount of time going over his piston descriptions.

Steve